package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexPatterns;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.BitFieldSubCommands;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static com.hmdp.utils.RedisConstants.*;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    /**
     * 手机号码正则 验证手机号码格式
     *
     * @param mobile
     * @return true 说明格式匹配上了 (具体分析见下文)
     */
    public static Boolean isMobile(String mobile) {
        String regex = "^((13[0-9])|(14[579])|(15([0-3]|[5-9]))|(16[56])|(17[0-8])|(18[0-9])|(19[1589]))\\d{8}$";
        Pattern p = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
        Matcher m = p.matcher(mobile);
        return m.matches();
    }

    @Override
    public Result sendCode(String phone, HttpSession session) {


        if (StringUtils.isEmpty(phone)) {
            //throw new RuntimeException();
            return Result.fail("手机号不能为空");
        }
        Boolean isPhone = isMobile(phone);
        if (!isPhone) {
            return Result.fail("手机号格式不正确");
        }
        String code = RandomUtil.randomNumbers(6);

        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code, RedisConstants.LOGIN_CODE_TTL, TimeUnit.MINUTES);
        log.info(code);
        return Result.ok();
    }

    @Override
    public Result userLogin(LoginFormDTO loginForm, HttpSession session) {

        if (loginForm == null) {
            return Result.fail("信息不能为空");
        }
        String phone = loginForm.getPhone();
        if (StringUtils.isEmpty(phone)) {
            return Result.fail("手机号不能为空");
        }
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式不正确");
        }

        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);

        String code = loginForm.getCode();
        if (cacheCode == null || !cacheCode.equals(code)) {
            return Result.fail("手机验证码不正确");
        }

        User user = query().eq("phone", phone).one();

        if (user == null) {
            user = createUserWithPhone(loginForm);
        }

        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);


        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create()
                        .ignoreNullValue()
                        .setFieldValueEditor((fileName, fileValue) -> fileValue.toString()));


        String token = UUID.randomUUID().toString(true);
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey, userMap);
        stringRedisTemplate.expire(tokenKey, LOGIN_USER_TTL, TimeUnit.MINUTES);

        return Result.ok(token);
    }

    @Override
    public Result sign() {
        Long userId = UserHolder.getUser().getId();
        LocalDateTime now = LocalDateTime.now();
        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key = USER_SIGN_KEY + userId + keySuffix;
        int dayOfMonth = now.getDayOfMonth();
        stringRedisTemplate.opsForValue().setBit(key, dayOfMonth - 1, true);
        return Result.ok();
    }

    @Override
    public Result signCount() {
        Long userId = UserHolder.getUser().getId();
        LocalDateTime now = LocalDateTime.now();
        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key = USER_SIGN_KEY + userId + keySuffix;
        int dayOfMonth = now.getDayOfMonth();

        List<Long> res = stringRedisTemplate.opsForValue().bitField(
                key,
                BitFieldSubCommands.create()
                        .get(BitFieldSubCommands.BitFieldType.unsigned(dayOfMonth))
                        .valueAt(0)
        );
        Long num = res.get(0);
        if (num == null || num == 0) {
            return Result.ok(0);
        }
        int count = 0;
        while (true) {
            if ((num & 1) == 0) {
                break;
            } else {
                count++;
            }
            num >>>= 1;

        }
        return Result.ok(count);
    }

    private User createUserWithPhone(LoginFormDTO loginForm) {

        User user = new User();
        user.setPhone(loginForm.getPhone());
        user.setNickName("heima_" + RandomUtil.randomString(10));
        boolean save = save(user);
        log.info(save + "");

        return user;
    }

}
